Fixing Nexus repo path, scopt version and Netty version

NB: Latest Netty 3.8.0 is not in repo, please donload it separately and put netty.jar to ~/.ivy2/local/org.jboss.netty/netty/3.8.0.Final/jars/
Proper fix for hashing for ConsistentHash
Now its compatible with Graphite-web, so, metrics hit same carbon caches as
Graphite-web, so we got cache-hit and metrics are reading from RAM instead of disk
Logging changes and error handlind
I commented out "Invalid message" error - we got ton of them
and provide (ugly) error handling when we got non-numeric value
(we also got ton of them, its only put garbage in logs)
Oops, Netty 3.8.0 is not working, but 3.7.0 is :)
Merge remote-tracking branch 'deniszh/master'